$(function() {
  $('.jikei-topics:odd').addClass('jikei-topics-right');
  $('.jikei-topics:even').addClass('jikei-topics-left');
  
  $('.jikei-topics:nth-child(2n+2)').after('<div style="clear: both; border-bottom: 1px dotted rgb(204, 204, 204);margin:0;padding:0;margin-bottom:15px;"><hr style="display: none;" /></div>');
  
  
});